MyWi - Turn your iPhone into a wireless 3G hotspot
Available through the underground Cydia app store, MyWi is the No. 1 reason you need to jailbreak your iPhone. In a few seconds, the app turns your iPhone into a wireless 3G hotspot — extremely useful in times when you don't have a Wi-FI connection and need to surf the web with your computer, or even your Wi-Fi-only iPad. That's right — unlimited tethering with no monthly fees.
